Met with the person they called me in to meet. Had a 20 minute or so interview asking me about myself and things on my resume. Was then introduced to two more people and had a short 10 minute interview with them, again about me and things on my resume. Met back with the original interviewer and got a tour around the place.

First round is the phone interview, where they go through your resume and job expectations. Second is a technical interview where things get a little technical and third is the onsite interview where they show around the facility and see if you are a good fit (technical and personality wise)